1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a63a083a73526605bd7b3e47a4fe48114d81e1c08a4c43eb62ab972cfdfe2d3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3c8d27d-ce7f-43c9-9a5b-91443cef2276.json and https://artists.proofprofile.net/proofs/artist/c3c8d27d-ce7f-43c9-9a5b-91443cef2276.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ace17da0fd67a0aa843ff2ba069ca1a277081e5eba594869160f9c000d9a9c7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ322300322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf139ddc0f29d9af257cb866f8a26900925c6e1b2e188471fde430a152f946699. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ322300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf139ddc0f29d9af257cb866f8a26900925c6e1b2e188471fde430a152f946699. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:08:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ322300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9f0c6192114ffc6329ac6ca7188ea22eabb4f82dfe84921a8b3d21c389bc40. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ322300325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633615149f127af1add5cecaa68a9d26a1498816ceda1a163a34e5f1ef80164b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ322300328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50ccff90472f95e2b798d072e6c53048e3139898dc460c03f8772ce9542faf4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ322300631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc1aac7ba85c04767c928b27a65d210596d786af00aa562ed9ce42bda0689fe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLAZ2402130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026e36422e66657dfd5257e0db665f813b2597709105a404fce4963027194583. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ322500186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dfb87c3bd9b4dd50da5151eda3541b3cda7b6ad1fae02f7b10aa315f64279e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862401711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8c565617877e8e085ffa7b6ebbe9e2e74c071775c2a9cfb31d9718ea5f8343. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLAZ2402134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3ac015e493d9a40329dc9c53bf43b01d993c81c4254e93ee7931457f9ce4d5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM72207040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3ac015e493d9a40329dc9c53bf43b01d993c81c4254e93ee7931457f9ce4d5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM72207040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8c565617877e8e085ffa7b6ebbe9e2e74c071775c2a9cfb31d9718ea5f8343. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLAZ2402134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dfb87c3bd9b4dd50da5151eda3541b3cda7b6ad1fae02f7b10aa315f64279e. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:30:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862401711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8c565617877e8e085ffa7b6ebbe9e2e74c071775c2a9cfb31d9718ea5f8343. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLAZ2402134.